PPS composite material for air tightness of automobile oil-cooled copper bar and preparation method of PPS composite material

Abstract

The invention relates to the technical field of oil-cooled copper bar materials, in particular to a PPS composite material for air tightness of an automobile oil-cooled copper bar and a preparation method, the PPS composite material comprises the following raw materials by weight: 50-60% of PPS resin, 0.2-1% of a coupling agent, 0.5-2% of black color master batch, 0.2-1% of a lubricant, 1-3% of epoxy resin and 35-45% of glass fiber; the PPS composite material disclosed by the invention has good metal binding force (gt; 5 MPa); good epoxy binding force (gt; 40 MPa); good silica gel binding force (gt; 8 MPa); after high-temperature durability, the binding force strength retention rate is gt; 80%; the mechanical property is good; and the electrical performance is stable after high-damp-heat aging.

Description

Technical Field

[0001] The present invention relates to the technical field of oil-cooling copper busbar materials, and in particular to a PPS composite material for improving the airtightness of automobile oil-cooling copper busbars and a preparation method thereof. Background Art

[0002] The oil-cooling copper busbars in new energy vehicle motors and electronic controls provide both electrical conductivity and insulation between various modules. The market is gradually shifting from water and oil cooling to oil-based cooling. To prevent the cooling oil (ATF) from leaking into other modules, the connecting copper busbars must be airtight.

[0003] However, conventional PPS materials currently on the market often fail to maintain airtightness after injection molding or exposure to high and low temperatures. Some customers use dispensing (epoxy and silicone systems) to solve this problem.

[0004] However, conventional PPS materials have weak bonding strength with metals (copper busbars are made of copper, aluminum, nickel-plated, tin-plated, etc.) and low adhesion with epoxy and silicone. Therefore, the air tightness of PPS materials currently on the market still does not meet the requirements even after customers apply glue. Summary of the Invention

[0005] In order to solve the above technical problems, embodiments of the present invention provide a PPS composite material for automobile oil-cooled copper exhaust tightness and a preparation method.

[0006] To achieve the above objectives, the embodiments of the present invention adopt the following technical solutions:

[0007] On the one hand, the present invention provides a PPS composite material for improving the exhaust tightness of automobile oil-cooled copper. The composite material comprises the following raw materials, calculated by percentage by total weight of the raw materials: 50-60% PPS resin, 0.2-1% coupling agent, 0.5-2% black masterbatch, 0.2-1% lubricant, 1-3% epoxy resin and 35-45% glass fiber.

[0008] In some embodiments, the PPS resin has a melt index of 500 to 800 g / 10 min.

[0009] In some embodiments, the coupling agent includes at least one of γ-aminopropyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, and γ-mercaptopropyltriethoxysilane.

[0010] In some embodiments, the lubricant includes one or more of silicone powder, polyethylene wax, and erucamide.

[0011] On the other hand, the present invention also provides a method for preparing a PPS composite material for automobile oil-cooled copper exhaust tightness, comprising the following steps:

[0012] PPS resin, black masterbatch, lubricant and epoxy resin are first mixed, and then a coupling agent and glass fiber are added and mixed. The mixture is then added into an extruder and extruded to obtain a PPS composite material for automobile oil-cooled copper exhaust tightness.

[0013] In some embodiments, the temperatures of the extruder from the first zone to the ninth zone are set to 270-290°C, 285-305°C, 285-305°C, 285-305°C, 275-295°C, 265-285°C, 260-280°C, 255-275°C, and 245-265°C, and the head temperature is 290-310°C.

[0014] In some embodiments, the main engine speed of the extruder is 350-450 rpm.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The PPS composite material of the present invention has good metal bonding strength (>5MPa); good epoxy bonding strength (>40MPa); good silicone bonding strength (>8MPa); after high-temperature durability, the above bonding strength retention rate is >80%; it has good mechanical properties; and stable electrical properties after high-humidity and heat aging.

[0017] 1) Density 1.57~1.68g / cm 3 ;

[0018] 2) Tensile strength>160MPa, elongation at break>1.6%; flexural strength>260MPa; elastic modulus>14GPa; cantilever beam notched impact strength>11kJ / m 2 ;

[0019] 3) Copper bonding strength>6MPa; Tin bonding strength>5MPa; Nickel bonding strength>5MPa; Epoxy bonding strength>40MPa; Silicone bonding strength>8MPa;

[0020] 4) After aging for 1000 hours, the volume resistivity of double 85 is greater than 10 12 (Ω.cm);

[0021] 5) The exterior can be spray-painted, the paint adhesion is enhanced, and it can pass the 100-grid test;

[0022] 6) Laser coding is possible. DETAILED DESCRIPTION

[0023] The technical solutions in some embodiments of the present disclosure are clearly and completely described. Obviously, the embodiments described are only some of the embodiments of the present disclosure, not all of them. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0024] Example 1

[0025] Calculated by percentage by total weight of the raw materials, 60% PPS resin, 0.5% black masterbatch, 0.2% lubricant and 1% epoxy resin are first mixed, and then 0.2% coupling agent and 38.1% glass fiber are added and mixed. The melt index of the PPS resin is 500g / 10min, the coupling agent includes γ-aminopropyltriethoxysilane, and the lubricant includes silicone powder. The mixture is then added to an extruder. The main engine speed of the extruder is 350rpm. The temperatures of the extruder from the first to the ninth zone are set to 270°C, 285°C, 285°C, 285°C, 275°C, 265°C, 260°C, 255°C, and 245°C, respectively. The head temperature is 290°C. Extrusion obtains a PPS composite material for automotive oil-cooled copper exhaust tightness.

[0026] Example 2

[0027] Calculated by percentage by total weight of the raw materials, 50% PPS resin, 2% black masterbatch, 1% lubricant and 1% epoxy resin are first mixed, and then 1% coupling agent is added and mixed with 45% glass fiber. The PPS resin has a melt index of 600g / 10min, the coupling agent includes γ-glycidyloxypropyltrimethoxysilane, and the lubricant includes erucamide. The mixture is then added to an extruder. The main engine speed of the extruder is 400rpm. The temperatures of the extruder from the first to the ninth zone are set to 280°C, 285°C, 290°C, 300°C, 295°C, 285°C, 280°C, 275°C and 265°C, respectively. The head temperature is 300°C. Extrusion is performed to obtain a PPS composite material for automotive oil-cooled copper exhaust tightness.

[0028] Example 3

[0029] Calculated by percentage by total weight of the raw materials, 55% of PPS resin, 1.5% of black masterbatch, 0.5% of lubricant and 2.5% of epoxy resin are first mixed, and then 0.5% of coupling agent and 40% of glass fiber are added and mixed. The melt index of the PPS resin is 700g / 10min, and the coupling agent includes γ-mercaptopropyltriethoxysilane. The lubricant is erucamide. The mixture is then added to an extruder. The main speed of the extruder is 450rpm. The temperatures of the extruder from the first to the ninth zone are set to 290°C, 305°C, 305°C, 305°C, 295°C, 285°C, 280°C, 275°C and 265°C, respectively. The head temperature is 310°C. Extrusion obtains a PPS composite material for automotive oil-cooled copper exhaust tightness.

[0030] Example 4

[0031] Calculated by percentage by total weight of the raw materials, 58% PPS resin, 1.5% black masterbatch, 0.5% lubricant and 3% epoxy resin are first mixed, and then 1% coupling agent and 36% glass fiber are added and mixed. The melt index of the PPS resin is 700g / 10min, the coupling agent includes γ-aminopropyltriethoxysilane, and the lubricant includes polyethylene wax. The mixture is then added to an extruder. The main engine speed of the extruder is 450rpm. The temperatures of the extruder from the first to the ninth zone are set to 280°C, 295°C, 300°C, 305°C, 295°C, 285°C, 280°C, 275°C and 265°C, respectively. The head temperature is 310°C. Extrusion is performed to obtain a PPS composite material for automotive oil-cooled copper exhaust tightness.

[0032] Example 5

[0033] Calculated by percentage by total weight of the raw materials, 53% PPS resin, 0.5% black masterbatch, 1% lubricant and 2.5% epoxy resin are first mixed, and then 1% coupling agent and 42% glass fiber are added and mixed. The melt index of the PPS resin is 700g / 10min, the coupling agent includes γ-glycidyloxypropyltrimethoxysilane, and the lubricant includes polyethylene wax. The mixture is then added to an extruder. The main speed of the extruder is 400rpm. The temperatures of the extruder from the first to the ninth zone are set to 290°C, 295°C, 300°C, 305°C, 295°C, 285°C, 280°C, 275°C and 265°C, respectively. The head temperature is 300°C. Extrusion is performed to obtain a PPS composite material for automotive oil-cooled copper exhaust tightness.

[0034] Example 6

[0035] Calculated by percentage by total weight of the raw materials, 57% PPS resin, 1.5% black masterbatch, 0.5% lubricant and 2.5% epoxy resin are first mixed, and then 0.5% coupling agent and 38% glass fiber are added and mixed. The melt index of the PPS resin is 800g / 10min, the coupling agent includes γ-glycidyloxypropyltrimethoxysilane, and the lubricant includes erucamide. The mixture is then added to an extruder. The main engine speed of the extruder is 450rpm. The temperatures of the extruder from the first to the ninth zone are set to 270°C, 285°C, 290°C, 295°C, 290°C, 285°C, 280°C, 275°C and 265°C, respectively. The die temperature is 310°C. A PPS composite material for automotive oil-cooled copper exhaust tightness is obtained by extrusion.

[0036] Example 7

[0037] Calculated by percentage by total weight of the raw materials, 50% PPS resin, 1.5% black masterbatch, 0.5% lubricant and 2.8% epoxy resin are first mixed, and then 0.2% coupling agent and 45% glass fiber are added and mixed. The melt index of the PPS resin is 800g / 10min, the coupling agent includes γ-aminopropyltriethoxysilane, and the lubricant includes erucamide. The mixture is then added to an extruder. The main speed of the extruder is 450rpm. The temperatures of the extruder from the first to the ninth zone are set to 280°C, 285°C, 290°C, 295°C, 290°C, 285°C, 280°C, 275°C, and 265°C, respectively. The head temperature is 300°C. Extrusion is performed to obtain a PPS composite material for automotive oil-cooled copper exhaust tightness.

[0038] Example 8

[0039] Calculated by percentage by total weight of the raw materials, 51% of PPS resin, 2% of black masterbatch, 1% of lubricant and 3% of epoxy resin are first mixed, and then 1% of coupling agent and 42% of glass fiber are added and mixed. The melt index of the PPS resin is 700g / 10min, the coupling agent includes γ-mercaptopropyltriethoxysilane, and the lubricant includes silicone powder. The mixture is then added to an extruder. The main engine speed of the extruder is 400rpm. The temperatures of the extruder from the first to the ninth zone are set to 290°C, 305°C, 305°C, 305°C, 295°C, 285°C, 280°C, 275°C and 265°C, respectively. The head temperature is 310°C. Extrusion obtains a PPS composite material for automotive oil-cooled copper exhaust tightness.

[0040] The PPS composite materials prepared in Examples 1 to 8 were subjected to performance tests, and the results were shown in Tables 1 and 2 below:

[0041] Table 1

[0042]

[0043] Table 2

[0044]

[0045] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0046] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A PPS composite material for automobile oil-cooled copper exhaust tightness, characterized in that: Calculated by percentage of the total weight of raw materials, the raw materials include: 50-60% of PPS resin, 0.2-1% of coupling agent, 0.5-2% of black masterbatch, 0.2-1% of lubricant, 1-3% of epoxy resin and 35-45% of glass fiber.

2. The PPS composite material for automobile oil-cooled copper exhaust tightness according to claim 1, characterized in that: The melt index of the PPS resin is 500 to 800 g / 10 min.

3. The PPS composite material for automobile oil-cooled copper exhaust tightness according to claim 1, characterized in that: The coupling agent includes at least one of γ-aminopropyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane and γ-mercaptopropyltriethoxysilane.

4. The PPS composite material for automobile oil-cooled copper exhaust tightness according to claim 1, characterized in that: The lubricant includes one or more of silicone powder, polyethylene wax, and erucamide.

5. A method for preparing a PPS composite material for exhaust tightness of automobile oil-cooled copper according to any one of claims 1 to 4, characterized in that: The following steps are involved: PPS resin, black masterbatch, lubricant and epoxy resin are first mixed, and then a coupling agent and glass fiber are added and mixed. The mixture is then added into an extruder and extruded to obtain a PPS composite material for automobile oil-cooled copper exhaust tightness.

6. The preparation method according to claim 5, characterized in that The temperatures of the extruder from the first zone to the ninth zone are set to 270-290°C, 285-305°C, 285-305°C, 285-305°C, 275-295°C, 265-285°C, 260-280°C, 255-275°C, and 245-265°C, and the head temperature is 290-310°C.

7. The preparation method according to claim 5, characterized in that The main engine speed of the extruder is 350-450 rpm.

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